<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.gif" alt="">
      </div>
      <!-- 登录表单区 -->
      <el-form ref="loginFormRef" label-width="0px" class="login_form" :model="loginForm" :rules="loginFromRules">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input prefix-icon="el-icon-user-solid" v-model="loginForm.username"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input @keyup.enter.native="login" prefix-icon="el-icon-right" v-model="loginForm.password" type="password" ></el-input>
        </el-form-item>
        <!--按钮区域-->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
  import Vue from 'vue'
  import { Message } from 'element-ui'
  Vue.prototype.$message = Message
  export default {
    data () {
      return {
        // 登录表单的数据对象
        loginForm: {
          username: '',
          password: ''
        },
        // 表单验证规则对象
        loginFromRules: {
          username: [
            { required: 0, message: '账号不能位空，请输入账号', trigger: 'blur' },
            { min: 3, max: 10, message: '亲 账号格式不正确 请输入3~10位', trigger: 'blur' }
          ],
          password: [
            { required: true, message: '密码不能为空，请输入密码', trigger: 'blur' },
            { min: 6, max: 15, message: '密码请输入6~15个字母或数字之间', trigger: 'blur' }
          ]
        }
      }
    },
    methods: {
       login () {
        // 发起请求之前进行验证 表单数据是否合法（表单预验证）
        this.$refs.loginFormRef.validate(async (valid) => {
          if (!valid) return this.$message.error('格式有误')
          const { data: res } = await this.$http.post('login', this.loginForm)
          if (res.meta.status !== 200) {
            return this.$message.error('登录失败')
          }
          this.$message.success('登录成功')
          // 将登录成功之后的 token，保存到客户端的 sessionStorage 中
          window.sessionStorage.setItem('token', res.data.token)
          // 通过编程式导航跳转到后台主页，路由地址是 /home
          this.$router.push('/home')
          // console.log(res)
        })
      },
      // 重置按钮
      resetLoginForm () {
        this.$refs.loginFormRef.resetFields()
      }
      // isBlur() {
      //    this.login()
      // }
    }
  }
</script>

<style lang="less" scoped>
  .login_container {
    background-color: #2b4b6b;
    height: 100%;
  }
  .login_box {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    transform: translate(-50%, -50%);
    .avatar_box {
      position: absolute;
      left: 50%;
      transform: translate(-50%, -50%);
      height: 130px;
      width: 130px;
      border: 1px solid #eee;
      border-radius: 50%;
      box-shadow: 0 0 10px #ddd;
      padding: 10px;
      background-color: #fff;
      img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
      }
    }
  }
  .login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }
  .btns {
    display: flex;
    justify-content: flex-end;
  }
</style>
